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Background: Coronary stents are commonly used to treat obstructive coronary artery disease. It is currently difficult to reliably predict in-stent restenosis. The aim of this study was to examine the relationship between bare metal stent restenosis and red cell distribution width (RDW), neutrophil/lymphocyte ratio (N/L ratio). It was the first study that used a control group with a normal coronary angiogram. Methods: We enrolled patients who underwent coronary angiography between June 2012 and September 2013 in our center. We enrolled a cohort of 210 consecutive patients, of which 130 had a coronary artery stent and 80 had a normal coronary angiogram. Results: The mean age of the study group was 62 (38-86) years. The mean RDW levels of patient group with no-restenosis were significantly higher than the control group but there was no significant difference between the mean RDW levels of the restenosis group and the other subgroups (14.9 (11.7-17.6), 15.5 (10.9-20.4), 15.4 (11.7-20.1), respectively). N/L ratio was significantly higher in patients with stent restenosis 2.32(1.49-5.35) compared to the other two groups whereas there was no significant difference between the control group and non-restenosis group with respect to N/L ratio. (1.71(0.84-7.89), and 2.09(0.89-9.15), respectively). Conclusions: According to our findings, RDW was not a predictor of stent restenosis or coronary artery disease. On the other hand, our findings support the hypothesis that N/L ratio is an indicator of inflammation that plays a role in-stent restenosis.

Red Cell Distribution Width and Neutrophil/lymphocyte Ratio in Bare Metal Coronary Artery Stent Restenosis